1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1858cf1a01f565993535b5dbfb76e4ccd1a632ae5cb3fe854ae5a7a765a9fea. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a951aa1a-39a2-4e96-a7f9-58a0de30dcad.json and https://artists.proofprofile.net/proofs/artist/a951aa1a-39a2-4e96-a7f9-58a0de30dcad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf96846b837461487596d9750229c51112a8e108bfcfe64f8020a79e2b6e2f99. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROCF0500488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701c0a1919d914cda1d40b2a26e8fd87f7cc4bc081b623dbe739b09e8802331e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROCF0800388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7699967e38c93a6d8e0cbf4ae666bc796d59f5672e9678da67958a95d38492. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROCF0500490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549c3118102d0d5954c224c6b161ee20d0be62030f073575e45bf04a13ae0796. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROCF0100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e2a732c5ded66eeace69896855fc5d77515e181f0e75df308841577a640df3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROCF0100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd7e87ff9b9882b88ca2ac9ef50fcd5ca929ad52d0c4bbbfcc2afc1e3eaab4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROCF0100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85a4abf0d499844ff964a9b6fc9729b04ee8e37d8ba99f3294b42d52bc246a9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:27:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROCF0100218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0a05e81b97a7234e9f9e7d2c7a1c802efac7f31d241d82a909e49279651a52. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0400718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f36ef491e77c5eca8c5d6b3d17888f9ca6272230a577667f3a093c7ba36af1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0400722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb767d9ef5f4d522a46c4585dd039a7dd78562fb5e7f63389c1f03734971691c. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0400723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bcf4b493a2441c066276aa07cdf872d38ea86f86cf5a87519b8f561356824c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0400725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc796efde6c526f7e50dfaa1532e3358b8533c2978ba0c22194d852d8e53a47a7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0400726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa71d09b79364ceac99da8883bbd189e651d1490fc5c9750e75ba68ffdd577e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0500906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ad35ea36801a7ccf26b76f195bd93066664da2043029a3dd28e681a057e717. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0500909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20bf35f7e9e9a70333d0e9f6fd0368be735164ff1b350f3ec89279bff92e766. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8894cfa230b65db93822b31848910f4f02f65903da3237266a5a2c2450d9165. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0300490.
Minha Estirpe Crioula: 35 Anos de Música
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac6235d9987916773d50080f83d39be0f7cdf489026c010bf2d0a94a900077e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2147821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd8900deef06c6cc17572314fdc1cb8e0f49e7d1a6b19c5741af9ed42ec2249. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61993c628faac7e70c42027abd3701f77bdb510a9bcfe64572ee0fb165cccc14. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROK32400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cb04e0195ff1f00bb066141b921ff837320704a5f9df1563843c344cf20970. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:51:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROK32500003.
18° Coxilha Nativista: Um Festival Loco de Bagual
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26b60500d041be31c3b78fdb6584ddcd20cf443228cbb36a4482d5dfa5068ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRTMV1000826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1c904844c58681db389d5dae179b3ed47d3284a11a17754a43f43c35524470. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0300534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2336cba44cd8a790f0927da884e7634e242852e86d2943b2b5a2c0c279bc5d10. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0402016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e2a866ba62ae186b10d60383808f8880f143072fd8c5d439065f60d1b0eece. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROCF0101233.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch